NC-17
adjective uk/ˌen.si.sev.ənˈtiːn/ us/ˌen.si.sev.ənˈtiːn/
（美国官方电影级别）NC-17级的，17岁以下少儿不宜的
used officially in the US to refer to a film that is not considered suitable for children under the age of 17 to watch because it contains sex or violence
This movie is rated NC-17. 这部电影被列入NC-17级别。
Compare: G, g (FILM)PGU, u adjective (FILM) X, x adjective